Ok so i have been and tried to drain the final drive this morning, i have had a partial success, but could only tip it around 45 degs i need to undo the final drive unit from the bike, there is a big 24mm and a bigger than T55 torx head on the other end, it's also super tight, so what size is the torx head please as i don't have a tprx big enough and i don't fancy improvising

Did you slide the drive u joint off the final drive input shaft? If so it should swing down as far as needed.
That is a T55. But never took it apart there myself.
Clymer makes a manual for the bike. Also the factory DVD is a good thing to have. All the details of how to perform jobs are shown. No trouble shooting though.

Is this a K1300S? Your drain plug is on the bottom and fill is on top. You don't need to remove the final drive to change oil unless you are lubing the splines and if you are doing that, just remove the bolt on the tension strut and tip the final drive back a little. Insert a screwdriver in the u-joint and pry it away from the final drive. The driveshaft does not have the cir-clip on the transmission side, so the driveshaft will move with the final drive.

I got off track, the conversation about lowering the final drive had me thinking "no drain plug" K12 bike. Wrong. as mentioned above you do have one. And filling is easy through the ABS sensor hole. Just keep track of the oring and small metal spacer that is easy to loose. Remember that the drain plug is Torx and has an oring on it too. So it does not need to be any tighter than 14Nm. There s a torx driver that seems to fit the drain plug but it is the next size too small really. Be sure you choose the one that fits very snug.

My drain plug is straight on the back of the final drive, pointing towards the back. I replaced the stock drain plug with a magnetic plug.
Remove the rear wheel and put the bike on the center stand. Remove the torx bolt on the stabilizer bar at the top of the final drive.
Work the flexible boot loose and tilt the final drive down. The drive shaft slides off the splines so just work it off the splines as you tilt the final drive down.
Remove the drain plug and let it drain for a while. The fill bolt is behind the brake disc accessed from the right side. You will need to turn the disc to position it so you can get to it.

On my bike the fill plug is the sensor. I remove the sensor and using a syringe but the new oil in there. They have changed the recommended amount for the oil/fluid. Use Synthetic GL-5 75W-90 6.087 oz. This cuts down on the pressure build up inside the final drive and saves the seals.
While the oil is draining, use a couple of screw drivers and carefully work the boot back enough to revel the drive shaft and splines at the back of the engine. Work the drive shaft toward the back of the bike exposing the splines. I use a small screw driver like a spatula and spread the lube on the splines. With the transmission in neutral, rotate the drive shaft and paste the lube on the splines. Now go back to the final drive and paste the lube on the final drive splines.
Put the drain plug back in and using a syringe put in the new oil. Install the plug or sensor depending on your bike. Make sure you have the boot cover in place. Now align the drive shaft with the splines on the final drive and start tilting the final drive back up working the drive shaft back onto the splines. Work the boot back into place and when you get everything lined back up put the torx bolt back in and torque it to specs.
Now go back up to engine where the drive shaft attaches and work that boot back into place.
I change my oil every winter. I believe the spec is every 12,000 miles. There are others on this forum that have additional ways to help out.
du907

Register Now

In order to be able to post messages on the K-Bikes.com - Excellence in Motion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.